Kindly edit your first post and remove "ABANDONED" from the subject. The ABANDONED label makes the rest of us look bad as though we gave up on you which is far from the case.:1) the topic's only two weeks old and as volunteers and fellow-users we don't guarantee immediate solutions. 2) you never did provide your Quick System Info as you were asked to do to provide others with the information they need to help you, causing further delays. It's quite possible that there is a driver for your internal wifi card on Github that you can install but without the specific information about the car's chipset we can't help you with that. 3) the only flag that should go in the title is "solved" when someone's issue is resolved. This flag is inserted by clicking the checkmark button at the right of the post containing the solution. The "solved" flag the appears in the topic lists and in search results and is a link to that post with the solution. This is so people who search the forum about an issue they're having can more easily find their solution rather than starting a new topic to ask for help with an issue that already has a known solution. Clicking on the green solved link in their search results takes them directly to the solution so they'll know what to do.
Also, backporting newer system components into Debian Stable, which MX-21 is based on, is not recommended and can make your system become unstable. See "Don't Break Debian" in my signature.
ath11k module not loading in MX21 ahs
Re: ABANDONED: ath11k module not loading in MX21 ahs
Please read the Forum Rules, How To Ask For Help, How to Break Your System and Don't Break Debian. Always include your full Quick System Info (QSI) with each and every new help request.